Flora of Borrego Mountain
desert five-spot, Eremalche rotundifolia, in Hawk Canyon on 28 March 2011. Left: flower. Right: calyx in fruit, with just two seeds left.
Borrego Mountain as seen from the curve just beyond mile 8.5 on the portion of S22 known as the Montezuma Grade, on 6 December 2005, on an especially clear day. See Views From the Montezuma Grade of S22 for identifications of other features in the photograph.

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Introduction
Procedure For Compiling the Checklist
Analysis of the Checklist
Important Caveats
Checklist

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Flora of Borrego Mountain

This checklist is a start at a flora of Borrego Mountain, compiled from surveys of five different areas in 2011 and voucher records.

For this checklist, the Borrego Mountain area is defined as including San Felipe Wash as its northern boundary; SR78 as its southern boundary, with the short section of Borrego Springs Road as its western boundary, and the longitude of Benson Lake as its eastern boundary. This boundary is shown in Fig. 1, along with the locations of our surveys and of vouchers.

Fig. 1. Boundary of the Borrego Mountain Floral Area (heavy black line), and locations of the five survey areas (labeled lines and cross) and vouchers (blue diamonds).

The flora of Borrego Mountain has additional interest because it has some aspects of being an "Island Flora" since it is an isolated (small) range not connected to any of the surrounding mountain ranges. Borrego Mountain is surrounded by Badlands and alluvial sediment. Hence the species that live only in rugged regions, and that cannot live in alluvial areas, can't easily get here. If they do, but not too frequently, and/or their population doesn't quickly go to fairly large numbers, they can suffer extinction due to normal population fluctuations, just like a typical island flora.

Procedure For Compiling The Checklist

The Checklist was compiled from field work done by the authors and from online vouchers.

Field Surveys

Five different locations were surveyed; their locations are shown in Fig. 1, and the parameters of the surveys for each are given in Table 1. Three of those locations were surveyed twice; the other two were surveyed a single time.

The survey areas were:

• SR78. Two nearby areas were surveyed, at the northwest corner of SR78 and Buttes Pass Road, and the southwest corner of SR78 and the access road to Harper Canyon. These were "accidental" survey areas, done first while waiting for everyone to show up, and then because we weren't allowed into the Borrego Mountain area for about an hour while unexploded ordinance was being blown up.

• West. This survey of the West Butte area is the 4 mile route described in Schad. We first surveyed the vicinity of the parking area at the top of The Slot. We then hiked to the peak of the West Butte, and took the use trail to the west to a tributary of Borrego Mountain Wash. This tributary was one of the richest areas of that survey. We followed that tributary to the junction with Borrego Mountain Wash, then surveyed up Borrego Mountain Wash through The Slot back to the cars.

  In the second survey of this area, we did the route in reverse.

• Hawk Canyon. This delightful canyon was surveyed up to just past the farthest point that cars can travel, where the bottom begins to be overgrown with shrubs. We surveyed counterclockwise on the first survey, and again reversed it on the second survey.

• North base of West Butte. We had intended to survey the area of San Felipe Wash, at its junction with Buttes Pass Road. But that area was so depauperate on 11 January 2011 that we instead drove west to the north base of the West Butte, and surveyed a small loop in that area.

  On the return trip on 28 March 2011, we had time to survey only about one fourth of the area surveyed on 11 January 2011.

• Goat. We drove the Goat Trail to its highest point, then parked and surveyed to the east, into the top portion of Blow Sand Canyon.

A total of 35 hours of field surveys were done on five days in January - March 2011 by the following people:

• 6 January 2011, West Butte, by Tom Chester, Mike Crouse, James Dillane, with RT and Shaun Hawke and Bill Sullivan helping with a portion of the survey.

• 11 January 2011, Hawk Canyon, north base of Borrego Mountain, by Tom Chester, Mike Crouse, Pam Pallette, with RT and Shaun Hawke helping with a portion of the survey.

• 3 February 2011, Goat Trail, by Tom Chester, Mike Crouse, Vince Balch, and James Dillane.

• 8 March 2011, West Butte and SR78, by Tom Chester, Mike Crouse, Vince Balch, and Kate Harper.

• 28 March 2011, Hawk Canyon, north base of Borrego Mountain, by Tom Chester and Kate Harper.

The authors of this page are those that contributed at least 20% of the total survey time.

The parameters of each survey area are given in Table 1.

Table 1. Characteristics of the Survey Areas and Number of Taxa Found

Area	Distance (miles)	Survey Time (hours)	# of People	# of Taxa
SR78	0.1	1	4	42
West	4.0	14	4-6	102
Hawk	0.5	10.5	2-5	88
North	0.8	4	2-5	76
Goat	1.9	4.5	4	72

A total of 128 taxa were found in the union of all the surveys, 121 native and 7 non-native.

Table 2 gives a breakdown of how many taxa were found in 1, 2, 3, 4 or all 5 survey areas.

Table 2. Number Of Taxa Found, Separated By The Number Of Survey Areas Containing Each Taxon

# Survey Areas	# Native Taxa	# Non-Native Taxa
1	32	3
2	18	0
3	19	1
4	24	2
5	28	1
All	121	7

As expected, the largest number of taxa were found in only a single survey area. However, instead of the usual continuous decline to smaller numbers with larger number of survey areas, the number of native taxa actually increases moderately toward ones found in all five survey areas. This most likely indicates a low variability in the types of habitats here. The histogram is also affected by the large difference in size between the surveyed areas, which favors preferentially finding the widespread species.

Voucher Records

The vouchers come from a search on 5 January 2011 and on 31 March 2011 of the Consortium of California Herbaria.

On 5 January 2011, the Consortium records were searched for San Diego County specimens found between latitudes of 33.15 and 33.24° and longitudes of -116.24 and -116.14°. The localities were examined and vouchers not in the Borrego Mountain area as defined above were removed.

On 31 March 2011, the Consortium records were searched for San Diego County specimens with the words Borrego and mountain in their locality field. This returned 1,904 records, which were almost entirely not in the Borrego Mountain area (with such localities as Anza-Borrego Desert State Park, Laguna Mountains Region). Only 99 vouchers were not georeferenced. Only those vouchers were examined, as a complement to the previous coordinate search. Of those, six were actually in the Borrego Mountain area.

Two vouchers were rejected as being incorrectly determined:

• CHSC96397. Its determination of Hazardia squarrosa is incorrect if it was actually collected in its locality of Borrego Mountain Wash between the end of The Slot and the jeep road leading up out of the wash, since that is where we found Isocoma acradenia. Hazardia squarrosa is not found east of the crest of the Laguna Mountains in this area. The closest voucher from there is 21 miles west of Borrego Mountain.

• RSA599300. Its determination of Ditaxis serrata is incorrect since that species does not occur in San Diego County according to the 2006 Checklist of the Vascular Plants of San Diego County by Rebman and Simpson. Plants that were previously referred to D. serrata are now classified as D. neomexicana.

The final list contained 120 vouchers of 75 distinct taxa. Bill Sullivan was the dominant collector by far, with 52 vouchers, 43% of the total. Larry Hendrickson, Kim Marsden, L. Louise Jee contributed 18 vouchers, 15% of the total. Joe Barth collected 10 vouchers, 8% of the total. The remaining 40 vouchers were collected by 13 different groups.

Total Checklist

The total checklist present below contains 140 taxa. Of those 140 taxa, 63 were both found in our survey and have vouchers from this area; 65 taxa were found only in our surveys, and 12 taxa were found only from vouchers.

The 12 taxa found only in vouchers were mostly found in areas we did not survey, especially the San Felipe Wash and lower Blow Sand Canyon / Wash area.

Three of the taxa found only in vouchers are very similar to species we found: Loeseliastrum schottii, Eriogonum reniforme, and Schismus arabicus from vouchers; Loeseliastrum matthewsii, Eriogonum thomasii, and Schismus barbatus from our surveys. We suspect the first two voucher species are misdetermined, and will check those vouchers when we get the chance. See also Loeseliastrum matthewsii and L. schottii.

We didn't bother to distinguish the two Schismus species in our surveys, but all the Schismus plants we have checked in the Borrego Desert have been S. barbatus. That, of course, does not necessarily imply that the plants here are also S. barbatus, but that is the way to bet. We'll check some plants in the future to be sure, as well as that voucher.

Analysis of the Checklist

Species not found here

Since this flora is similar to an island flora, it is of interest to see what species are not found here, that are common in the surrounding area. The most common species found in our other Borrego Desert surveys, that are not found here, are given in Table 3.

Table 3. Most Common Borrego Desert species not found at Borrego Mountain

# Other Survey Areas	Scientific Name	Common Name
51	Opuntia ganderi	Gander's cholla
50	Opuntia basilaris var. basilaris	beavertail cactus
48	Ferocactus cylindraceus	California barrel cactus
38	Trixis californica var. californica	California trixis
37	Cheilanthes parryi	woolly lipfern
36	Adenophyllum porophylloides	San Felipe dogweed
34	Salvia columbariae	chia

Interestingly, both ferns and cactus are on that list. The flora of Borrego Mountain has no ferns at all, and is missing two of the most widespread and abundant cactus species, Ferocactus cylindraceus and Opuntia basilaris. (Opuntia ganderi isn't expected here since it prefers wetter, cooler areas. It is replaced here by O. echinocarpa.)

Species of which only a single plant was found

It is also interesting to see the somewhat-numerous species of which we found only one single plant in a single survey. They even include a single Opuntia bigelovii, which almost never comes as a single plant! In this case, it was because of the small area surveyed at SR78. There were numerous plants along Buttes Pass Road to the north, but that area wasn't included in any survey.

Just as amazing was the single plant of Erodium cicutarium we found at the parking area for The Slot. This was either a waif, from cars or hikers, or the earliest plant of an invasion to come there. It is very heartening to see the abundance of the native Erodium texanum on every survey here, along with the absence of E. cicutarium.

Interesting species pairs

The numbers in the checklist below look like an error was made for the determination of the Phacelia crenulata varieties. We found only var. minutiflora everywhere except in the West survey, where all we found was var. ambigua! But those varieties are very distinct, and no error was made.

Diversity of species here

The Borrego Mountain Area is currently the second most depauperate area in Tom's database. Table 4 gives the ratio of the number of native taxa found to that predicted for the most depauperate areas. The prediction is from a power law best fit to the number of taxa versus area for the areas for all southern California in Tom's database (number of taxa = 128 * area in square miles ^ 0.28).

As expected, low desert regions have lower species counts than island floras due to their much more extreme climate for heat, cold, and the lack of rainfall. Although the number of taxa in the Checklist will undoubtedly increase as more of Borrego Mountain is surveyed, it is unlikely to improve its ranking much on this list for those reasons.

Borrego Mountain is about twice as diverse as the Borrego Badlands since it has more habitats than the Badlands, including additional rock types. The Borrego Badlands consist entirely of young, mostly saline, sedimentary rock. That rock is also found at Borrego Mountain, where it is accompanied by ancient metamorphic bedrock, with much more vertical relief than is found in the Badlands rock formations.

Two other species-challenged areas are represented in Table 4:

• The tree canopies in the Pine Belt of our local mountains deprive the forest floor of sunlight, creating large areas that consist of only a handful of tree species. The high elevations of the Pine Belt also have an extreme climate for cold, and for a short growing season.

• Island floras are depauperate because it is difficult for many mainland species to reach islands; only species capable of dispersal across bodies of water can populate islands. In addition, the small area of islands causes low numbers for some species, which can then go extinct simply from normal population fluctuations from year to year.

Table 4. Ratio Of The Number Of Native Taxa Found To That Predicted From The Species / Area Relationship For southern California.

Ratio	Area
0.23	Borrego Badlands
0.45	Borrego Mountain
0.50	northeast Vallecito Mountains
0.58	San Clemente Island
0.59	Coyote Mountain area, Borrego Springs
0.59	SnGb Pine Belt (Johnston)
0.76	Starfish cove / Alma Canyon / Wash
0.78	high desert mtns

Of course, depauperate does not mean there aren't interesting species here, or that this is not a beautiful area! It only means it has a low number of different species.

Some of the beautiful flowers in this area are:

• the big beautiful blooms of Xylorhiza orcuttii;

• hillsides of desert five-spot, Eremalche rotundifolia; ghost flower, Mohavea confertiflora, including a hill with a single plant with 88 flowers open at once, and Phacelia crenulata var. ambigua.

• fields of Lupinus arizonicus and Monoptilon bellioides.

And there aren't many places where one can find plants of three Chorizanthe species, C. brevicornu, C. corrugata, and C. rigida, growing within inches of each other. Depauperate dry, saline areas like here are the only place that dead man's fingers, Calandrinia ambigua, grows in the Borrego Desert.

Important Caveats

As is the case for all floras, this one is undoubtedly incomplete. It is clear from Fig. 1 that many areas of Borrego Mountain have not yet been surveyed, including the entire East Butte, the lower part of Blow Sand Canyon and Borrego Mountain Wash, several drainages on the northwest side of West Butte, and most of the San Felipe Wash below Borrego Springs Road.

In addition, it is likely that even the surveyed areas are incomplete. Table 5 gives the number of taxa found in the three areas that were surveyed twice, 2.0 to 2.5 months apart.

Table 5. Number of Taxa Found in Repeated Surveys.

Survey Area	Date	# Taxa each Survey	Cumulative # Taxa total from all surveys
West	6 January 2011	85	85
West	8 March 2011	94	102
Hawk	11 January 2011	68	68
Hawk	28 March 2011	84	88
North	11 January 2011	64	64
North	28 March 2011	61*	76

^* The survey of the North base of Borrego Mountain was of a much shorter distance on 28 March 2011, yet it still added 12 species to its flora.

It is quite clear from Table 5 that it is unlikely we've recorded all the species in each of those areas. Surveys at different times of year, and in different years, find different species.

Finally, the numbers of some annual species may be too low in some cases. Since our surveys were all done in a single year, they couldn't reflect the proper abundance of annuals that did not germinate well this year. For example, we found Oligomeris linifolia in only one location in Hawk Canyon, where there were over 100 dead plants from a previous year, and only one live one this year. Every good year is different, due to the different germination requirements of different species.

Checklist for Borrego Mountain

The Checklist is sorted first by category - dicots, monocots, and ferns - and then by family and scientific name. The Family and Scientific Name are from the 1993 first edition Jepson Manual. An asterisk before the Common Name indicates a non-native taxon.

Estimates of the minimum number of plants are given in the subsequent columns for each taxon observed in each of the five survey areas, up to a a maximum of 99 plants.

The column #V gives the number of vouchers from this area for each taxon.

Version for printing, without lines and other text on this page: html (6 pages) or pdf Clickbook booklet (2 double-sided pages). (See printing instructions for an explanation of these options)

#	FAM	Scientific Name	(*)Common Name	# of Plants					#V
				SR78	West	Hawk	Goat	North
1	Amaranthaceae	Tidestromia oblongifolia	Arizona honeysweet		3
2	Asclepiadaceae	Asclepias subulata	rush milkweed		5	1	10		1
3	Asclepiadaceae	Sarcostemma hirtellum	rambling milkweed		20	5			1
4	Asteraceae	Ambrosia dumosa	burroweed	10	99	99	99	50	3
5	Asteraceae	Bebbia juncea var. aspera	sweetbush		50	40	20	20	2
6	Asteraceae	Calycoseris wrightii	white tackstem	30	50	50	1	10	1
7	Asteraceae	Chaenactis carphoclinia var. carphoclinia	pebble pincushion	30	99	99	40	99
8	Asteraceae	Chaenactis stevioides	desert pincushion	10	10	99	99		1
9	Asteraceae	Chrysothamnus paniculatus	blackbanded rabbitbrush						1
10	Asteraceae	Dicoria canescens	desert dicoria			6	50	2
11	Asteraceae	Encelia farinosa	brittlebush	3	99	99	99	50	4
12	Asteraceae	Encelia frutescens	button encelia		4		2	10	1
13	Asteraceae	Filago californica	California filago			99
14	Asteraceae	Geraea canescens	hairy desert-sunflower		99	99	99	50	2
15	Asteraceae	Hymenoclea salsola var. salsola	cheesebush		50	10		5
16	Asteraceae	Isocoma acradenia var. eremophila	solitary-leaved alkali goldenbush		10
17	Asteraceae	Malacothrix glabrata	desert dandelion	15	99	99	99	10	2
18	Asteraceae	Monoptilon bellioides	desert star	1	99	10	4	99	1
19	Asteraceae	Palafoxia arida var. arida	desert needle	1	30	50	50	5	3
20	Asteraceae	Pectis papposa var. papposa	chinch-weed		1	3		4	2
21	Asteraceae	Perityle emoryi	Emory's rock-daisy		99	99	10	99	1
22	Asteraceae	Peucephyllum schottii	pygmy-cedar				1
23	Asteraceae	Pleurocoronis pluriseta	arrow-leaf		20
24	Asteraceae	Psathyrotes ramosissima	turtleback					1
25	Asteraceae	Rafinesquia neomexicana	desert chicory		10	2	4	20
26	Asteraceae	Senecio mohavensis	Mojave ragwort		99	50		30	2
27	Asteraceae	Stephanomeria exigua ssp. exigua	slender wreathplant			5	50		1
28	Asteraceae	Stephanomeria pauciflora var. pauciflora	wire-lettuce		10		20
29	Asteraceae	Trichoptilium incisum	yellow-head		30	75	20	30
30	Asteraceae	Xylorhiza orcuttii	Orcutt's woody-aster		2
31	Bignoniaceae	Chilopsis linearis ssp. arcuata	desert-willow					1	2
32	Boraginaceae	Cryptantha angustifolia	narrow-leaved cryptantha	99	99	99	99	99	4
33	Boraginaceae	Cryptantha barbigera	bearded cryptantha		99	50	3	30
34	Boraginaceae	Cryptantha maritima	Guadalupe cryptantha	10	99	99	99	99	1
35	Boraginaceae	Cryptantha micrantha	purple-root cryptantha						1
36	Boraginaceae	Cryptantha pterocarya	wing-nut cryptantha			1
37	Boraginaceae	Heliotropium curassavicum	seaside heliotrope						1
38	Boraginaceae	Pectocarya heterocarpa	chuckwalla pectocarya	1
39	Boraginaceae	Pectocarya platycarpa	broad-fruited combseed		30
40	Boraginaceae	Pectocarya recurvata	curvenut combseed		99		99
41	Boraginaceae	Tiquilia palmeri	Palmer's coldenia		25	50	99	1	2
42	Boraginaceae	Tiquilia plicata	plicate coldenia				15	50
43	Brassicaceae	Brassica tournefortii	*Asian mustard		99	99	99	99	2
44	Brassicaceae	Dithyrea californica	spectacle-pod		5		50
45	Brassicaceae	Guillenia lasiophylla	California mustard		50
46	Brassicaceae	Lepidium lasiocarpum var. lasiocarpum	hairy-podded pepper-grass	10	99	10	20	20	1
47	Brassicaceae	Sisymbrium irio	*London rocket	5	99	50		40
48	Cactaceae	Mammillaria tetrancistra	fish-hook cactus		5
49	Cactaceae	Opuntia bigelovii	teddy-bear cholla	1
50	Cactaceae	Opuntia echinocarpa	silver cholla	1	20	3	99	3
51	Campanulaceae	Nemacladus glanduliferus	glandular nemacladus						1
52	Caryophyllaceae	Achyronychia cooperi	frost mat		5	1		10	4
53	Chenopodiaceae	Atriplex canescens ssp. canescens	four-wing saltbush		5
54	Chenopodiaceae	Atriplex hymenelytra	desert holly		99			99
55	Chenopodiaceae	Atriplex polycarpa	cattle saltbush		70	10	15	10
56	Chenopodiaceae	Chenopodium murale	*nettle-leaved goosefoot	1		10		3
57	Cuscutaceae	Cuscuta californica var. papillosa	papillate dodder		2				1
58	Euphorbiaceae	Chamaesyce micromera	Sonoran spurge						1
59	Euphorbiaceae	Chamaesyce polycarpa	small-seeded spurge	10	99	50	99	50	3
60	Euphorbiaceae	Chamaesyce setiloba	starfish (Yuma) spurge	2
61	Euphorbiaceae	Croton californicus	California croton		15	50	50	10	2
62	Euphorbiaceae	Ditaxis lanceolata	narrowleaf ditaxis			6	1		1
63	Euphorbiaceae	Ditaxis neomexicana	New Mexico ditaxis	2					1
64	Euphorbiaceae	Stillingia spinulosa	annual stillingia			1
65	Fabaceae	Acacia greggii	catclaw		50	20	15	5	2
66	Fabaceae	Astragalus crotalariae	Salton milk-vetch					1
67	Fabaceae	Astragalus magdalenae var. peirsonii	Peirson's milk-vetch						1
68	Fabaceae	Dalea mollis	silky dalea		5				1
69	Fabaceae	Dalea mollissima	downy dalea	2	5	2	10	2
70	Fabaceae	Lotus salsuginosus var. brevivexillus	short-bannered coastal lotus		2
71	Fabaceae	Lotus strigosus	strigose lotus	5	20	30		20	2
72	Fabaceae	Lupinus arizonicus	Arizona lupine		40	99	99	99	3
73	Fabaceae	Olneya tesota	ironwood	1		25		1	2
74	Fabaceae	Prosopis glandulosa var. torreyana	honey mesquite		3				1
75	Fabaceae	Psorothamnus emoryi	Emory's indigo-bush		5	30	99	10	1
76	Fabaceae	Psorothamnus schottii	indigo bush		99	2	50	3	1
77	Fabaceae	Psorothamnus spinosus	smoke tree		50	30	10	50
78	Fouquieriaceae	Fouquieria splendens ssp. splendens	ocotillo	10	99	20	99	10	1
79	Geraniaceae	Erodium cicutarium	*redstem filaree		1
80	Geraniaceae	Erodium texanum	Texas filaree	50	25	50	50	30	1
81	Hydrophyllaceae	Emmenanthe penduliflora var. penduliflora	whispering bells		30	99		2
82	Hydrophyllaceae	Eucrypta micrantha	desert eucrypta		5	1			1
83	Hydrophyllaceae	Phacelia crenulata var. ambigua	heliotrope phacelia		99
84	Hydrophyllaceae	Phacelia crenulata var. minutiflora	little-flowered heliotrope phacelia	2		99	20
85	Hydrophyllaceae	Phacelia distans	common phacelia	10	99
86	Hydrophyllaceae	Phacelia pedicellata	pedicellate phacelia			2
87	Krameriaceae	Krameria erecta	Pima rhatany		30	3	50		1
88	Krameriaceae	Krameria grayi	white rhatany	5	99	3	50	35
89	Lamiaceae	Hyptis emoryi	desert-lavender		50	50		20	1
90	Loasaceae	Mentzelia involucrata	bracted blazing star		40	30		1
91	Loasaceae	Petalonyx thurberi ssp. thurberi	Thurber's sandpaper-plant		1		20		2
92	Malvaceae	Eremalche rotundifolia	desert five-spot	1		99	30	5	1
93	Malvaceae	Hibiscus denudatus	rock hibiscus		2	10	2		1
94	Nyctaginaceae	Abronia villosa var. villosa	hairy sand-verbena	1	40	20	99	5	2
95	Nyctaginaceae	Allionia incarnata	trailing four o'clock		20	10	40
96	Nyctaginaceae	Boerhavia wrightii	Wright's spiderling		10	50
97	Nyctaginaceae	Mirabilis bigelovii var. retrorsa	Bigelow's desert four-o'clock		30	20		10
98	Onagraceae	Camissonia boothii ssp. condensata	Booth's evening primrose	10	20	50	20	50	1
99	Onagraceae	Camissonia californica	California suncup	20	99	99	99	99
100	Onagraceae	Camissonia cardiophylla ssp. cardiophylla	heartleaf sun-cup		10	20	1		1
101	Onagraceae	Camissonia claviformis ssp. peirsonii	brown-eyed primrose	20	99	99	99	99	4
102	Onagraceae	Camissonia pallida ssp. pallida	pale sun-cup		30
103	Orobanchaceae	Orobanche cooperi	Cooper's broom-rape		3
104	Papaveraceae	Eschscholzia minutiflora ssp. minutiflora	small-flowered poppy	1	99	99	50	50	2
105	Papaveraceae	Eschscholzia parishii	Parish's poppy					20
106	Plantaginaceae	Plantago ovata	desert plantain	50	99	99	99	99	1
107	Polemoniaceae	Gilia diegensis	coastal gilia						1
108	Polemoniaceae	Gilia latifolia	broad-leaf gilia		99	60	10	99
109	Polemoniaceae	Gilia stellata	star gilia			1
110	Polemoniaceae	Langloisia setosissima ssp. setosissima	bristly langloisia	10	5	1	4	40
111	Polemoniaceae	Loeseliastrum matthewsii	desert calico		10	2	20	50	1
112	Polemoniaceae	Loeseliastrum schottii	Schott's calico						1
113	Polygonaceae	Chorizanthe brevicornu var. brevicornu	brittle spineflower		99	99	3	99
114	Polygonaceae	Chorizanthe corrugata	wrinkled spineflower			50		25
115	Polygonaceae	Chorizanthe rigida	devil's spineflower	1	50	10	50	99
116	Polygonaceae	Eriogonum deflexum var. deflexum	flat-topped buckwheat		25	99			1
117	Polygonaceae	Eriogonum inflatum	desert trumpet	1	50	20	30	3	2
118	Polygonaceae	Eriogonum reniforme	kidney-leaf buckwheat						2
119	Polygonaceae	Eriogonum thomasii	Thomas' buckwheat	1	99	99	99	99	3
120	Polygonaceae	Eriogonum trichopes	little desert trumpet		99
121	Portulacaceae	Calandrinia ambigua	desert red maids		99			10
122	Rafflesiaceae	Pilostyles thurberi	Thurber's pilostyles						1
123	Resedaceae	Oligomeris linifolia	lineleaf whitepuff		50	99	1	1
124	Scrophulariaceae	Mohavea confertiflora	ghost flower		99	20	1		1
125	Solanaceae	Datura discolor	desert thornapple			1		10
126	Solanaceae	Nicotiana obtusifolia	desert tobacco		10	15			1
127	Solanaceae	Physalis crassifolia	thick-leaved ground cherry		5	20	2		2
128	Viscaceae	Phoradendron californicum	desert mistletoe		50	20	3	15
129	Zygophyllaceae	Fagonia laevis	California fagonia		2		20
130	Zygophyllaceae	Larrea tridentata	creosote bush	30	99	99	99	99	2
131	Zygophyllaceae	Tribulus terrestris	*puncture-vine						1
132	Liliaceae	Agave deserti	desert agave	1					1
133	Liliaceae	Hesperocallis undulata	desert lily	3	6	5	35	2	1
134	Poaceae	Aristida adscensionis	six-weeks three-awn		99	99	99	99	3
135	Poaceae	Bouteloua aristidoides var. aristidoides	needle grama					50	1
136	Poaceae	Bromus madritensis ssp. rubens	*red brome		25
137	Poaceae	Pleuraphis rigida	big galleta		40	50	20	50	3
138	Poaceae	Schismus arabicus	*Mediterranean grass						1
139	Poaceae	Schismus barbatus	*Mediterranean schismus	99	99	99	99	99
140	Poaceae	Vulpia bromoides	*brome fescue		40

We thank Shaun Hawke for help with part of the 1/6/11 and 1/11/11 surveys, and Bill Sullivan for help with part of the 1/6/11 survey.

Voucher data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/)

Go to:

• Plants of Southern California: Regional Floras